package zlx.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问的方法，肯定OK
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id){
        return "线程池："+Thread.currentThread().getName()+"\tpaymentInfo_OK,id:"+id+"\t(❤ ω ❤)哈哈哈";
    }
    //服务降级的方法
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeoutHandler",commandProperties = {
            //设置响应超时峰值
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")
    })
    public String paymentInfo_Timeout(Integer id){
        int timeNumber =2;
//        int i=10/0;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
        return "线程池："+Thread.currentThread().getName()+" paymentInfo_Timeout,id:"+id+" (❤ ω ❤)哈哈哈"+"耗时";
    }
    public String paymentInfo_TimeoutHandler(Integer id){
        return "线程池："+Thread.currentThread().getName()+"系统繁忙或运行报错，请稍后再试,id:"+id+" ╥﹏╥...";
    }
//    服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircultBreaker_fallback",commandProperties = {
            //设置响应超时峰值
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),//是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if(id<0){
            throw new RuntimeException("*****id不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();//hutool产生一个UUID随机数
        return Thread.currentThread().getName()+"调用成功，流水号："+serialNumber;
    }
    public String paymentCircultBreaker_fallback(@PathVariable("id") Integer id){
        return "id不能为负数，请稍后再试，id："+id;
    }
}
